scholarly journals Aquatic Mosses as Adaptable Bio-Filters for Heavy Metal Removal from Contaminated Water

2020 ◽  
Vol 21 (13) ◽  
pp. 4769
Author(s):  
Paride Papadia ◽  
Fabrizio Barozzi ◽  
Danilo Migoni ◽  
Makarena Rojas ◽  
Francesco P. Fanizzi ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Significant Proportion ◽  
Pollutant Removal ◽  
Polluted Water ◽  
Aquatic Moss ◽  
Aquatic Mosses ◽  
High Concentrations ◽  
Short Time

Heavy metals (HMs) are released into the environment by many human activities and persist in water even after remediation. The efficient filtration of solubilized HMs is extremely difficult. Phytoremediation appears a convenient tool to remove HMs from polluted water, but it is limited by the choice of plants able to adapt to filtration of polluted water in terms of space and physiological needs. Biomasses are often preferred. Aquatic moss biomasses, thanks to gametophyte characteristics, can act as live filtering material. The potential for phytoremediation of Hypnales aquatic mosses has been poorly investigated compared to aquatic macrophytes. Their potential is usually indicated as a tool for bioindication and environmental monitoring more than for pollutant removal. When phytoremediation has been considered, insufficient attention has been paid to the adaptability of biomasses to different needs. In this study the heavy metal uptake of moss Taxiphyllum barbieri grown in two different light conditions, was tested with high concentrations of elements such as Pb, Cd, Zn, Cu, As, and Cr. This moss produces dense mats with few culture needs. The experimental design confirmed the capacity of the moss to accumulate HMs accordingly to their physiology and then demonstrated that a significant proportion of HMs was accumulated within a few hours. In addition to the biosorption effect, an evident contribution of the active simplistic mass can be evidenced. These reports of HM accumulation within short time intervals, show how this moss is particularly suitable as an adaptable bio-filter, representing a new opportunity for water eco-sustainable remediation.

Potential of Agricultural Waste Material (Ananas cosmos) as Biosorbent for Heavy Metal Removal in Polluted Water

2020 ◽  
Vol 1010 ◽  
pp. 489-494
Author(s):  
Abdul Hafidz Yusoff ◽  
Rosmawani Mohammad ◽  
Mardawani Mohamad ◽  
Ahmad Ziad Sulaiman ◽  
Nurul Akmar Che Zaudin ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Adsorption Capacity ◽  
Metal Removal ◽  
Low Cost ◽  
Agricultural Waste ◽  
Heavy Metal Removal ◽  
Polluted Water ◽  
Maximum Adsorption Capacity ◽  
Pineapple Peel

Conventional methods to remove heavy metals from polluted water are expensive and not environmentally friendly. Therefore, this study was carried out to investigate the potential of agricultural waste such as pineapple peel (Ananas Cosmos) as low-cost absorbent to remove heavy metals from synthetic polluted water. The results showed that Cd, Cr and Pb were effectively removed by the biosorbent at 12g of pineapple peels in 100 mL solution. The optimum contact time for maximum adsorption was found to be 90 minutes, while the optimum pH for the heavy metal’s adsorption was 9. It was demonstrated that with the increase of adsorbent dosage, the percent of heavy metals removal was also increased due to the increasing adsorption capacity of the adsorbent. In addition, Langmuir model show maximum adsorption capacity of Cd is 1.91 mg/g. As conclusions, our findings show that pineapple peel has potential to remove heavy metal from polluted water.

Pollutant removal efficiency of alternative filtration media in stormwater treatment

2006 ◽  
Vol 54 (6-7) ◽  
pp. 299-305 ◽  
Author(s):  
N. Seelsaen ◽  
R. McLaughlan ◽  
S. Moore ◽  
J.E. Ball ◽  
R.M. Stuetz
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Wood Ash ◽  
Pollutant Removal ◽  
Added Value ◽  
Metal Contaminants ◽  
High Concentration ◽  
Recycled Glass

Sorption experiments were used to assess the ability of various materials (sand, compost, packing wood, ash, zeolite, recycled glass and Enviro-media) to remove heavy metal contaminants typically found in stormwater. Compost was found to have the best physicochemical properties for sorption of metal ions (Cu, Zn and Pb) compared with sand, packing wood, ash, zeolite and Enviro-media. The compost sorption of these metal ions conformed to the linear form of the Langmuir adsorption equation with the Langmuir constants (qm) for Zn(II) being 11.2 mg/g at pH 5. However, compost was also found to leach a high concentration of dissolved organic carbon (DOC, 4.31 mg/g), compared with the other tested materials. Various combinations of sand, compost and other materials were observed to have excellent heavy metal removal (75–96% of Zn and 90–93% of Cu), with minimal DOC leaching (0.0013–2.43 mg/g). The sorption efficiency of the different Enviro-media mixes showed that a combination of traditional (sand) and alternative materials can be used as an effective medium for the treatment of dissolved metal contaminants commonly found in stormwater. The application of using recycled organic materials and other waste materials (such as recycled glass) also provides added value to the products life cycle.

scholarly journals Cyanobacterial Extracellular Polymeric Substances for Heavy Metal Removal: A Mini Review

2020 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Ajit Pratap Singh Yadav ◽  
Vinay Dwivedi ◽  
Satyendra Kumar ◽  
Anamika Kushwaha ◽  
Lalit Goswami ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Extracellular Polymeric Substances ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Lethal Effect ◽  
Aqueous System ◽  
Anthropogenic Sources ◽  
Cyanobacterial Species ◽  
High Concentrations

Heavy metals from various natural and anthropogenic sources are becoming a chief threat to the aquatic system owing to their toxic and lethal effect. The treatment of such contaminated wastewater is one of the prime concerns in this field. For decades, a huge array of innovative biosorbents is used for heavy metal removal. Though extensive microbes and their biomolecules have been experimented and have showed great potential but most of them have failed to have the substantial breakthrough for the practical application. The present review emphasis on the potential utilization of the cyanobacteria for the heavy metal removal along with the toxic effect imposed by the pollutant. Furthermore, the effect of significant parameters, plausible mechanistic insights of the heavy metal toxicity imposed onto the cyanobacteria is also discussed in detail. The role of extrapolymeric substances and metallothionein secreted by the microbes are also elaborated. The review was evident that the cyanobacterial species have a huge potential towards the heavy metal removal from the aqueous system ranging from very low to very high concentrations.

Low Cost Absorbents, Techniques, and Heavy Metal Removal Efficiency

2018 ◽  
pp. 50-79
Author(s):  
Harendra Kumar Sharma ◽  
Irfan Rashid Sofi ◽  
Khursheed Ahmad Wani
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Future Research ◽  
Removal Of Heavy Metals ◽  
Living Species ◽  
High Concentrations

Heavy metal contamination in water is a serious concern to the environment and human health. High concentrations of heavy metals in the environment can be toxic to a variety of living species. Natural bio-absorbents are abundant and inexpensive and considered a waste if not managed properly. The role of bio-absorbents has been widely studied and has been utilized for the removal of heavy metals. The objective of the chapter is to search the database for different absorbents and their efficiency for the removal of heavy metals. Key words related to the study have been used to select different papers published by the researchers all over the world. A rigorous three-tier process has been utilized by the authors to select the papers from the database for the current study. This chapter has identified a few research gaps in the field of heavy metal removal by using different low cast absorbents that need to be taken into account in future research.

scholarly journals On copper removal from aquatic media using simultaneous and sequential iron-perlite composites

2020 ◽  
Author(s):  
Mouhammad Shadi Khudr ◽  
Yassin Mohamed Elhassan Ibrahim ◽  
Arthur Garforth ◽  
Abdullatif Alfutimie
Keyword(s):  
Metal Removal ◽  
Heavy Metal Removal ◽  
Volcanic Glass ◽  
Polluted Water ◽  
Coarse Powder ◽  
X Ray ◽  
Solid Iron ◽  
Short Run ◽  
Time Specific ◽  
Short Time

The use of reusable, affordable, and inert adsorbents as a means to mitigate copper pollution, with a lesser burden on the environment, has been attracting some attention. However, aiding the adsorption process of a promising adsorbent, such as expanded volcanic glass (perlite), with a reducing companion, such as solid iron, that can displace and dispose of copper from polluted water has never been tested before. In this laboratory study, we investigated the removal of Cu2+, resulting from contaminating freshwater with copper sulphate pentahydrate, using simultaneous or non-simultaneous (sequential) mixes of expanded perlite and iron coarse powder over 23 hours. The percentage of copper removed was calculated at 15 min, 40 min, 120 min, 300 min, and 1380 min using induced coupled plasma (ICP-OES). A rapid removal of 71% at 120 min was achieved when the perlite and iron were added simultaneously in separate permeable pouches; the application of the iron after the perlite led to 78% of removal at 1380 min that was almost identical to what was accrued via perlite alone (77%). This, therefore, suggests that the presence of iron is most advantageous in the short run as it leads to fast uptake of Cu2+, attributable to the combined action of the reduction of Cu2+ by iron and Cu2+ adsorption by perlite. Further investigation in support of the results was carried out using Energy-Dispersive X-Ray Spectroscopy (EDAX), X-Ray Diffraction (XRD), Brunauer, Emmett and Teller (BET), and Fourier-Transform Infrared Spectroscopy (FTIR). The findings of this multidisciplinary work provide insights and mechanisms for heavy metal removal from water in a relatively short time using a novel time-specific combination of iron and perlite and thus merit wider testing across different classes of adsorbents, pollutants, and water systems.

scholarly journals A general route to modify diatomite with niobates for versatile applications of heavy metal removal

RSC Advances ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 3816-3827 ◽  
Author(s):  
Tianning Wang ◽  
Yunfei Yang ◽  
Jinshu Wang ◽  
Junshu Wu ◽  
Lingmin Sun ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Polluted Water

Nanostructured niobates are crystallized on natural diatomite for cleaning polluted water with heavy metal ions.

scholarly journals Investigation of locust bean husk char adsorbability in heavy metal removal

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 29-35
Author(s):  
Ajayi-Banji Ademola ◽  
Ogunlela Ayo ◽  
Ogunwande Gbolabo
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Retention Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Freundlich Isotherm ◽  
Polluted Water ◽  
Safe Level ◽  
Column Adsorption ◽  
Locust Bean

he column adsorption study examines irrigation water treatment prior to its application in order to ensure water-crop-consumer heavy metal transfer reduction to the safe level using locust bean husk char (LBHC) as biosorbent. Char structural pattern was investigated with SEM-EDX machine. Contaminated surface water was introduced simultaneously into the bioreactors containing 100 and 200 g of LBHC and collected after 30, 60, 90 120 and 150 min of detention time. Removal efficiency, isotherm and kinetic sorption model were the evaluation tools for the study. Percent of Cr, Cd and As removal at 150 min retention time were 83.33, 100 and 100%, respectively for 100 g biosorbents. A similar trend was observed for Cr and As removal at the same retention time for 200 g of LBHC. Metals sorption conforms to the Freundlich isotherm with correlation coefficient values greater than 0.92. Experimental kinetics had a good fit for pseudo second order (R<sup>2</sup> &gt; 0.94 for most cases). Removal efficiency is a function of contact time, biosorbent dosage and metal concerned. Locust bean husk char has good and effective treatability for some heavy metals in mildly polluted water.

Heavy metal removal from polluted water by Nopal cactus biopolymer-based magnetic nanocomposites

2021 ◽  
Vol 13 (1) ◽  
pp. 42
Author(s):  
Nghia T. Bui ◽  
Loan T.B. Duong ◽  
Thach T.C. Nguyen ◽  
Ngoc T.T. Tran
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Polluted Water ◽  
Magnetic Nanocomposites

scholarly journals Facile synthesis of mesoporous carbon nanocomposites from natural biomass for efficient dye adsorption and selective heavy metal removal

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2259-2269 ◽  
Author(s):  
Long Chen ◽  
Tuo Ji ◽  
Liwen Mu ◽  
Yijun Shi ◽  
Logan Brisbin ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mesoporous Carbon ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Dye Adsorption ◽  
Organic Dye ◽  
Polluted Water ◽  
Facile Synthesis ◽  
Carbon Nanocomposites ◽  
Catalytic Graphitization

Mesoporous carbon nanocomposites, processed from natural cottonviacatalytic graphitization, show excellent organic dye adsorption and selective heavy metal removal from polluted water.

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